The aim of this study was to design and construct an improved response surface method(RSM) based on weighted regression for the anti-slide reliability analysis of concrete gravity dam.The limitation and lacuna of the ...The aim of this study was to design and construct an improved response surface method(RSM) based on weighted regression for the anti-slide reliability analysis of concrete gravity dam.The limitation and lacuna of the traditional RSM were briefly analyzed.Firstly,based on small experimental points,research was devoted to an improved RSM with singular value decomposition techniques.Then,the method was used on the basis of weighted regression and deviation coefficient correction to reduce iteration times and experimental points and improve the calculation method of checking point.Finally,a test example was given to verify this method.Compared with other conventional algorithms,this method has some strong advantages:this algorithm not only saves the arithmetic operations but also greatly enhances the calculation efficiency and the storage efficiency.展开更多
高水平体育赛事已成为体育事业发展的重要助推手段和城市软实力展示的重要媒介,受到了全世界的重视。面对频繁举办的各类体育赛事,其竞争力评价对城市、主办者、参与者都具有重要意义。为科学评价我国体育赛事的竞争力水平,从基础竞争...高水平体育赛事已成为体育事业发展的重要助推手段和城市软实力展示的重要媒介,受到了全世界的重视。面对频繁举办的各类体育赛事,其竞争力评价对城市、主办者、参与者都具有重要意义。为科学评价我国体育赛事的竞争力水平,从基础竞争力和核心竞争力两个子系统出发构建马拉松赛事竞争力评价指标体系,采用结构熵权法和均方差决策法进行主客观联合赋权,并以我国13个顶级马拉松赛事为例,完成其竞争力综合评价的实证研究。研究发现:(1)经本研究构建评价指标体系实证所得出的我国顶级马拉松赛事竞争力排序与Ga WC(Globalization and World Cities)组织的世界城市排名结果具有较高匹配度,且这一结果较好契合现状认知,表明该评价指标体系和方法可为其他同类体育赛事竞争力的评价研究提供借鉴。(2)实证中马拉松赛事的基础竞争力与举办城市本身的社会经济实力密切相关,香港、北京、上海和广州等国际一流城市举办的马拉松赛事基础竞争力远远高于衡水等欠发达城市。(3)总体上第三方参度与和赛事水平在马拉松赛事核心竞争力中起着关键作用,台北、厦门、兰州等经济总量不大或中等偏上的城市马拉松赛事的核心竞争力排名比较靠前。(4)我国顶级马拉松赛事的综合竞争力排名从高到低为:香港、北京、广州、台北、上海、杭州、兰州、重庆、厦门、太原、深圳、东营和衡水。(5)我国顶级马拉松赛事竞争力可分为五个等级:香港、北京、广州和上海的马拉松赛事为高水平均衡型;台北和兰州的马拉松赛事为高水平单一型;杭州、重庆、太原和深圳的马拉松赛事为中等水平均衡型;厦门和东营的马拉松赛事为中等水平单一型;衡水马拉松赛事为低水平单一型。等级划分基础上还针对政府、组织者和参与者提出了发展运营、赛事组织、参与选择等方面的对策建议。展开更多
基金supported by the National Basic Research Program of China (Nos. 2007CB714107 and 90510018)the Trans-Century Training Programme Foundation for the Talents by the State Education Com-mission (No. NCET-06-0270),China
文摘The aim of this study was to design and construct an improved response surface method(RSM) based on weighted regression for the anti-slide reliability analysis of concrete gravity dam.The limitation and lacuna of the traditional RSM were briefly analyzed.Firstly,based on small experimental points,research was devoted to an improved RSM with singular value decomposition techniques.Then,the method was used on the basis of weighted regression and deviation coefficient correction to reduce iteration times and experimental points and improve the calculation method of checking point.Finally,a test example was given to verify this method.Compared with other conventional algorithms,this method has some strong advantages:this algorithm not only saves the arithmetic operations but also greatly enhances the calculation efficiency and the storage efficiency.
文摘高水平体育赛事已成为体育事业发展的重要助推手段和城市软实力展示的重要媒介,受到了全世界的重视。面对频繁举办的各类体育赛事,其竞争力评价对城市、主办者、参与者都具有重要意义。为科学评价我国体育赛事的竞争力水平,从基础竞争力和核心竞争力两个子系统出发构建马拉松赛事竞争力评价指标体系,采用结构熵权法和均方差决策法进行主客观联合赋权,并以我国13个顶级马拉松赛事为例,完成其竞争力综合评价的实证研究。研究发现:(1)经本研究构建评价指标体系实证所得出的我国顶级马拉松赛事竞争力排序与Ga WC(Globalization and World Cities)组织的世界城市排名结果具有较高匹配度,且这一结果较好契合现状认知,表明该评价指标体系和方法可为其他同类体育赛事竞争力的评价研究提供借鉴。(2)实证中马拉松赛事的基础竞争力与举办城市本身的社会经济实力密切相关,香港、北京、上海和广州等国际一流城市举办的马拉松赛事基础竞争力远远高于衡水等欠发达城市。(3)总体上第三方参度与和赛事水平在马拉松赛事核心竞争力中起着关键作用,台北、厦门、兰州等经济总量不大或中等偏上的城市马拉松赛事的核心竞争力排名比较靠前。(4)我国顶级马拉松赛事的综合竞争力排名从高到低为:香港、北京、广州、台北、上海、杭州、兰州、重庆、厦门、太原、深圳、东营和衡水。(5)我国顶级马拉松赛事竞争力可分为五个等级:香港、北京、广州和上海的马拉松赛事为高水平均衡型;台北和兰州的马拉松赛事为高水平单一型;杭州、重庆、太原和深圳的马拉松赛事为中等水平均衡型;厦门和东营的马拉松赛事为中等水平单一型;衡水马拉松赛事为低水平单一型。等级划分基础上还针对政府、组织者和参与者提出了发展运营、赛事组织、参与选择等方面的对策建议。
